<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.bigDiv{
				width: 640px;
				height: 600px;
				border:solid black 2px;
			}
			input, button{
			    outline: none;
			}
			
			html{
			    font-size: 10px;
			}
			
			body{
			    font-size: 1.6rem;
			}
			
			a{
			    color: purple;
			}
			input{
				width: 60%;
			}
		</style>
	</head>
	<body>
		<div class="bigDiv">
			<div class="div-1">
				<h4>手机号码</h4>
				<input name="phone" type="text" placeholder="填写你的手机号码作为登录账户">
			</div>
		</div>
	</body>
</html>